Minor drop in NEM Mainland System Frequency on Friday 11th Oct 2024, most likely related to trip of LYA1

A quick note to flag an ez2view alert (via the ‘Notifications’ widget) flagged to use the trip of Loy Yang A1 unit in the 5 minute period prior to the InitialMW snapshot at ~08:40 for the 08:45 dispatch interval (NEM time!) this morning … Friday 11th October 2024:

Given we’re tracking real time frequency, we took a quick look and saw the following trace, which shows a drop to ~49.90Hz (noting that this is not outside the NOFB):

Took a quick look at the ‘Generator Outages’ widget in ez2view as well, and see both LYA1 and LYA2 offline currently, both coloured red as ‘Unplanned’:

Whilst we note above that Loy Yang A1 unit tripped this morning, an ez2view alert (via the ‘Notifications’ widget) last night at 21:01 (NEM time) flagged that the Loy Yang A2 unit came offline from 153MW just prior to that time.

We already see (via the MT PASA DUID Availability data set) that AGL Energy thinks that unit will be offline through the weekend.

… with concerns about ‘Minimum System Load’ on at Sat 12th and Sun 13th Oct 2024, both units probably won’t be missed (at least through the ‘peak rooftop PV injection’ times in the middle of the day).

PS1 back online Friday afternoon

Also worth noting … again flagged in an ez2view alert (via the ‘Notifications’ widget) … that the unit returned to service Friday afternoon just prior to 13:30 as noted here: